Beijing Waiyan Online Digital Technology Co., Ltd.
Education v2.8.9
Does U校园5.0 work on iPhone Duo?
It works, but with black bars. U校园5.0 2.8.9 is built with the iOS 26.1 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
At a glance
- Inner display (7.6″)
- Black bars
- Outer display (5.4″)
- Works normally
- Built with
- iOS 26.1 SDK
- Version 2.8.9, read Oct 29, 2026
- iPad version
- No
- Phone-only layout today
- Latest version
- v2.8.9
- Oct 27, 2026
- Duo in release notes
- Not yet
About U校园5.0
U校园5.0 is made by Beijing Waiyan Online Digital Technology Co., Ltd. and first came out on the App Store in March 2023. It's only on the China App Store, where it has 7,437 ratings. Version 2.8.9 came out on Oct 27, 2026 and needs iOS 13.0 or later. It's free to download.
From its App Store listing:
U校园是外研社Unipus旗下的在线学习平台，为院校外语教学提供混合式教学解决方案。学、练、测、评一站式交互体验，通过生动优质的学习内容、高效便捷的教学工具、无缝对接的多终端支持，全方位提升学习体验和教学效果。基于云服务的基础架构和大数据分析的核心理念，支持听、说、读、写、译全题型的智能评分，通过高质量U校园AI版题库、个性化题库管理系统覆盖测评全流程，为高校创新教学保驾护航，实现智慧教学，智慧学习，Unipus，有你更精彩！
On the inner display
Apps built with older SDKs are placed in a phone-sized safe area on a black background. Everything works; you just don't get the bigger screen.
In Split View
iPhone Duo is the first iPhone that can show two apps side by side, and every app takes part — including U校园5.0. Open it on the inner display, then add a second app next to it. You can save the pair and come back to it later.
Duo-specific features
None confirmed yet. Duo-specific features include side toolbars, layouts that react to the fold, and content on the outer display while the app is open inside.
Evidence & history
App build,
Version 2.8.9 is built with the iOS 26.1 SDK
Apple runs apps built with the iOS 26 SDK or earlier in a phone-sized window on the inner display.
- : Not confirmed yet → Black bars — built with the iOS 26.4 SDK
Latest release notes
Version 2.8.9 · Oct 27, 2026
解决了已知问题，增加了系统稳定性。
Questions
Does U校园5.0 work on iPhone Duo?
It works, but with black bars. U校园5.0 2.8.9 is built with the iOS 26.1 SDK, so iPhone Duo runs it in a phone-sized window on the inner display.
Does U校园5.0 work on the outer display?
Yes. iPhone Duo's 5.4-inch outer display behaves like a regular iPhone screen, so every iPhone app works there as usual.
Can I use U校园5.0 in Split View on iPhone Duo?
Yes. On iPhone Duo every app can be placed side by side with another app on the inner display — developers don't need to opt in. How comfortable it feels at half width depends on the app's layout.
Why does U校园5.0 have black bars on iPhone Duo?
Apps built with the iOS 26 SDK or earlier run in a phone-sized window on the inner display, and iOS 27 builds can still leave some space empty. The bars disappear once the developer rebuilds the app with the iOS 27.1 SDK — you only need to update the app.
When will U校园5.0 fill iPhone Duo's inner display?
When its developer releases an update built with the iOS 27.1 SDK or later. We read the SDK of every new version of U校园5.0 within about a day of its release and update this page.
What can I do about the black bars until then?
Use U校园5.0 on the outer display, where it works like on any iPhone, or put it in Split View next to another app on the inner display so less of the screen goes unused.